The effect of slight thinning of managed coniferous forest on landscape appreciation and psychological restoration

Progress in Earth and Planetary Science

Table 4 Results of t-test comparison between the unthinned and thinned settings (physical environment)

Item		Unthinned		Thinned		t	p		r
		Mean	S.D.	Mean	S.D.
Temperature (°C)	n = 50	17.1	±2.52	18.6	±0.92	2.90	0.006	**	0.383
Relative humidity (%)		37.7	±20.42	92.4	±4.64	13.70	0.000	**	0.891
Wind velocity (m/s)		0.30	±0.19	0.16	±0.13	4.92	0.000	*	0.576
Radiant heat (°C)		21.8	±2.84	18.8	±1.05	2.19	0.034	**	0.299
Illuminance (Lux)	n = 119	668.4	±236.86	335.6	±171.84	8.23	0.000	**	0.604
Sound pressure (dB)	n = 119	L.O. up to 45.5		L.O. up to 46.1		–	–	–	–

L.O. shows the measurement limit (less than 40 dB) of the sound-level meter. The dB was listed from the minimum (measurement limit) to the maximum (actual number) as information of the sound pressure
**p < 0.01, *p < 0.05, paired t-test